Question
Book : Probability and Statistics for Computer Scientists Chapter 5 Exercise Problem 5.9 (Computer project) Twenty computers are connected to a network. One computer becomes
Book: Probability and Statistics for Computer Scientists
Chapter 5
Exercise Problem 5.9
(Computer project) Twenty computers are connected to a network. One computer becomes infected with a virus. Every day, this virus spreads from any infected computer to any uninfected computer with probability 0.1. Also, every day, a computer technician takes 5 infected computers at random (or all infected computers, if their number is less than 5) and removes the virus from them. Estimate:
(a) the expected time it takes to remove the virus from the whole network; (b) the probability that each computer gets infected at least once;
(c) the expected number of computers that get infected.
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